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时间:2020-03-25
《横纹槽管内插扭带复合强化传热的试验研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第52卷第24期2016年12月机械工程学报JOURNALOFMECHANICALENGINEERINGVbl.52Dec.No.242016DoI:10.3901/JME.2016.24.142横纹槽管内插扭带复合强化传热的试验研究木雷诗毅1郭亚军1桂淼2毕勤成2f1.西安建筑科技大学环境与市政工程学院西安710055:2.西安交通大学动力工程多相流国家重点实验室西安710049)摘要:不同强化传热方式的复合会产生不同的传热效果,通过试验将不同扭率的扭带与同一规格横纹槽管复合强化传热的效果进行对比。试验以
2、高黏度的导热油为工质,在5003、C值随RP数的增加而增加,且与扭率y成负相关;过渡流工况下,复合强化管的PEC值都随Re数的增加而减小,扭率y为5.21时的复合强化管综合换热效果最好。关键词:横纹槽管;扭带;复合强化传热;阻力系数;PEC中图分类号:TKl24ExperimentalStudyonCompoundHeatTransferEnhancementofTransverseCorrugatedTubewithFullLengthTwistedTapesLEIShiyilGUOYajunlGUIMia02BIQinchen92(1.4、SchoolofEnvironmentalandMunicipalEngineering,Xi’anUniversityofArchitecture&Technology,Xi’an710055;2.StateKeyLaboratoryofMultiphaseFlourinPowerEngineering,Xi’anJiaotongUniversity,Xi’an710049)Abstract:Thedifferentmodeofcompoundheattransferenhancementleadstod5、ifferenttransfereffect.Experimentalstudiesofcomparisonbetweendifferentcompoundtransferenhancementeffectsontransversecorrugated(TC)tubewithfull—lengthtwistedtapesofdifferenttwistratioshavebeenconductedwimoilofhighviscosity.ThevariationofNusseltnumberandresi6、stancecoefficientwithReynoldsnumbersarepresented,andthencorrelationforNusseltnumberandresistancecoefficientareobtainedbyamultivariablelinearregressionanalyrsisintherangeof5007、ormanceevaluationcriteria.Ascomparedwithsmoothtubeswithfull一lengthtwistedtapes.theresistancecoemcientofTCtubeswith如11一lengthtwistedtapeinsertscanbeincreasedby2—5times。theNucanbeincreasedbv1.4times.WiththeincreasingofRe.thetwistratiosarelessabletoinfluencet8、heM.ValuesofPECofTCtubeswim如11.1engthtwistedtapeinsertsinproportionofReandininverseproportionoftwistratiosontheconditionoflaminarflow.Undertheconditionoftransitionflow,thevaluesininverseproportionofRe.Inaddit
3、C值随RP数的增加而增加,且与扭率y成负相关;过渡流工况下,复合强化管的PEC值都随Re数的增加而减小,扭率y为5.21时的复合强化管综合换热效果最好。关键词:横纹槽管;扭带;复合强化传热;阻力系数;PEC中图分类号:TKl24ExperimentalStudyonCompoundHeatTransferEnhancementofTransverseCorrugatedTubewithFullLengthTwistedTapesLEIShiyilGUOYajunlGUIMia02BIQinchen92(1.
4、SchoolofEnvironmentalandMunicipalEngineering,Xi’anUniversityofArchitecture&Technology,Xi’an710055;2.StateKeyLaboratoryofMultiphaseFlourinPowerEngineering,Xi’anJiaotongUniversity,Xi’an710049)Abstract:Thedifferentmodeofcompoundheattransferenhancementleadstod
5、ifferenttransfereffect.Experimentalstudiesofcomparisonbetweendifferentcompoundtransferenhancementeffectsontransversecorrugated(TC)tubewithfull—lengthtwistedtapesofdifferenttwistratioshavebeenconductedwimoilofhighviscosity.ThevariationofNusseltnumberandresi
6、stancecoefficientwithReynoldsnumbersarepresented,andthencorrelationforNusseltnumberandresistancecoefficientareobtainedbyamultivariablelinearregressionanalyrsisintherangeof5007、ormanceevaluationcriteria.Ascomparedwithsmoothtubeswithfull一lengthtwistedtapes.theresistancecoemcientofTCtubeswith如11一lengthtwistedtapeinsertscanbeincreasedby2—5times。theNucanbeincreasedbv1.4times.WiththeincreasingofRe.thetwistratiosarelessabletoinfluencet8、heM.ValuesofPECofTCtubeswim如11.1engthtwistedtapeinsertsinproportionofReandininverseproportionoftwistratiosontheconditionoflaminarflow.Undertheconditionoftransitionflow,thevaluesininverseproportionofRe.Inaddit
7、ormanceevaluationcriteria.Ascomparedwithsmoothtubeswithfull一lengthtwistedtapes.theresistancecoemcientofTCtubeswith如11一lengthtwistedtapeinsertscanbeincreasedby2—5times。theNucanbeincreasedbv1.4times.WiththeincreasingofRe.thetwistratiosarelessabletoinfluencet
8、heM.ValuesofPECofTCtubeswim如11.1engthtwistedtapeinsertsinproportionofReandininverseproportionoftwistratiosontheconditionoflaminarflow.Undertheconditionoftransitionflow,thevaluesininverseproportionofRe.Inaddit
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